Efficient photocatalytic fixation of N2 by KOH-treated g-C3N4

Xiaoman Li; Xiang Sun; Ling Zhang; Songmei Sun; Wenzhong Wang

doi:10.1039/c7ta09762j

Efficient photocatalytic fixation of N₂ by KOH-treated g-C₃N₄

Xiaoman Li, Xiang Sun, Ling Zhang, Songmei Sun, Wenzhong Wang

Research output: Contribution to journal › Article › peer-review

132 Citations (Scopus)

Abstract

Development of N₂ photofixation under mild conditions is challenging; one reason for low efficiency is the poor reactivity between water and photocatalysts. Herein, C₃N₄ after KOH etching was used as an efficient photocatalyst, and CH₃OH was first introduced as a proton source. The photocatalyst presented a high ammonia evolution rate of 3.632 mmol g^-1 h^-1 and achieved an apparent quantum yield of 21.5% at ∼420 nm. In addition to the role of reacting with holes to accelerate the production and transfer of electrons, CH₃OH also promoted the solubility of N₂ and provided a proton to the activated N₂. The CH₃OH system should be instructive for a better understanding of proton-enhanced photocatalysis.

Original language	English
Pages (from-to)	3005-3011
Number of pages	7
Journal	Journal of Materials Chemistry A
Volume	6
Issue number	7
DOIs	https://doi.org/10.1039/c7ta09762j
Publication status	Published - 2018

All Science Journal Classification (ASJC) codes

Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1039/c7ta09762j

Cite this

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title = "Efficient photocatalytic fixation of N2 by KOH-treated g-C3N4",

abstract = "Development of N2 photofixation under mild conditions is challenging; one reason for low efficiency is the poor reactivity between water and photocatalysts. Herein, C3N4 after KOH etching was used as an efficient photocatalyst, and CH3OH was first introduced as a proton source. The photocatalyst presented a high ammonia evolution rate of 3.632 mmol g-1 h-1 and achieved an apparent quantum yield of 21.5% at ∼420 nm. In addition to the role of reacting with holes to accelerate the production and transfer of electrons, CH3OH also promoted the solubility of N2 and provided a proton to the activated N2. The CH3OH system should be instructive for a better understanding of proton-enhanced photocatalysis.",

author = "Xiaoman Li and Xiang Sun and Ling Zhang and Songmei Sun and Wenzhong Wang",

note = "Funding Information: We acknowledge the nancial support received from the National Basic Research Program of China (51772312, 21671197, 51472260) and the research grant obtained from the Shanghai Science and Technology Commission (16ZR1440800). Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2018.",

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AU - Li, Xiaoman

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AU - Zhang, Ling

AU - Sun, Songmei

AU - Wang, Wenzhong

N1 - Funding Information: We acknowledge the nancial support received from the National Basic Research Program of China (51772312, 21671197, 51472260) and the research grant obtained from the Shanghai Science and Technology Commission (16ZR1440800). Publisher Copyright: © The Royal Society of Chemistry 2018.

PY - 2018

Y1 - 2018

N2 - Development of N2 photofixation under mild conditions is challenging; one reason for low efficiency is the poor reactivity between water and photocatalysts. Herein, C3N4 after KOH etching was used as an efficient photocatalyst, and CH3OH was first introduced as a proton source. The photocatalyst presented a high ammonia evolution rate of 3.632 mmol g-1 h-1 and achieved an apparent quantum yield of 21.5% at ∼420 nm. In addition to the role of reacting with holes to accelerate the production and transfer of electrons, CH3OH also promoted the solubility of N2 and provided a proton to the activated N2. The CH3OH system should be instructive for a better understanding of proton-enhanced photocatalysis.

AB - Development of N2 photofixation under mild conditions is challenging; one reason for low efficiency is the poor reactivity between water and photocatalysts. Herein, C3N4 after KOH etching was used as an efficient photocatalyst, and CH3OH was first introduced as a proton source. The photocatalyst presented a high ammonia evolution rate of 3.632 mmol g-1 h-1 and achieved an apparent quantum yield of 21.5% at ∼420 nm. In addition to the role of reacting with holes to accelerate the production and transfer of electrons, CH3OH also promoted the solubility of N2 and provided a proton to the activated N2. The CH3OH system should be instructive for a better understanding of proton-enhanced photocatalysis.

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